aight i have i buddy of mine that is big on the ls1 forum and he has a damn good setup on his camaro and he is spraying... i asked him what plugs he was running and he told me NGK TR6... he then tells me b/c i plan on having spray on the car that i could use the same plugs.. now i had a 04 si on the spray and i ordered my plugs from sprakplugs.com now i have read on the ls1 forums that the ngk TR6 are like a universal nitrous plugs now my question is since this would be a 1 step colder plug for the 350z could i use them or do i have to order the LFR61A-11 from sprakplug.com???

reason for the question is if i can use the TR6 they are only 16 for 6 at a parts store and i would be paying close to 40+ for them on sparkplug.com??? dont make sense to me to pay more for something that is basicly the same if i could use them

taking everyones thoughts on this

 

just get the LFR 6a-11s its only a few more dollars and works 100%


good luck when you do it!!!

 

isnt copper better than iridium for nitrous?

 

Copper is the best period.

 

I think I am going to go back to coppers, too.

Does anyone have a part number for 1 step colder copper NGK plugs?

 

https://my350z.com/forum/nitrous-oxide/218158-nitrous-basics-thread-read-here-if-you-want-nitrous-for-the-first-time-3.html

post 46

same part # Audible Mayhem posted

 

What's wrong with using Iridium plugs? I am under the impression that they are great for use with NO2.

BTW, NGK P/N LFR6AIX-11 is what I ordered.

 

P.S. - what is the "proper" spark plug gap for a 100 shot, NX shark nozzle.

 

I cannot belive there are still threads like this poping up on internet car forums. So many people are mislead about plug types that it boggles my mind on how you can honestly think a Iridium or Platinum plug is better then copper expecially in nitrous application. I think its time we look into this question with some common sense.

First, lets talk about physical properties of metals..

Properties of Materials

Material -- Thermal Conductivity W/(m•K) -- Electrical Conductivity MS/m

Silver -- 407 -- 66
Copper -- 384 -- 57
Gold -- 310 -- 45
Iridium -- 147 -- 18
Platinum -- 70 -- 10
Nickel -- 59 -- 10



So now we know that Iridium sucks at both heat and electical conductivity.

So what does this mean?
1. It means you get more heat buildup in the electrode TIP! (notice I say TIP!) because of its metalic properties.

2. Not only does the metal suck but they reduced the tip size. What does reduced tip size do? It slows heat transfer even more from the tip of the plug.

3. So now that we have a really hot tip all we need is some fuel and pressure and we got pre-ignition and knock. Since our sparkplugs turned into glowplugs.

4. Why did I say tip earlier? Well, this might come as a shock to many of the morons out there but almost ALL PLATINUM AND IRIDIUM PLUGS USE A COPPER CORE this includes some peoples beloved POS denso sparkplugs. There are some more expensive platinum plugs that actually use a Silver Core but I have never seen a irdium/Silver core combo.

Shown here as #4


Link for more info.
http://www.densoiridium.com/spconstruction.php

So why do they use iridium sparkplugs?

That is easy, Irdium sparkplug tips are used because they are so dense that they last a long time. Since they are so dense they allow for such a small core tip to be used without drasticly effecting the lifespan of the sparkplug. This smaller tip does make the voltage requirements lower. This means you actually can get a good strong spark from a irdium plug but its at the cost of having a high heat tip that will not allow for as much nitrous or boost as a copper plug thus greatly reducing your HP potential. If you are running a N/A car you can file the tip of a copper plugs to get you more HP even more then a irdium plug. This of course makes them not last very long and also makes the tip hotter. The best trick to get more HP from just sparkplugs is to index them.

As shown Silver is the best material to build sparkplugs out of but very few people do it and those who do mostly use copper cores and silvertips. The only brand I have found to carry a true full silver sparkplug is bosch. However, I have not found a place to purchase said silversparkplugs so for now I will be useing coppers.

 

I'm running with them gapped at 35